diff --git a/src/lcd.c b/src/lcd.c
index 912843c..0accaec 100644
--- a/src/lcd.c
+++ b/src/lcd.c
@@ -28,7 +28,7 @@ void lcd_close(struct lcd_t *lcd) {
 	lcd->fd = -1;
 }
 
-void lcd_write(struct lcd_t *lcd, const uint8_t *cmdbuf, const uint8_t len) {
+void lcd_write(struct lcd_t *lcd, const uint8_t *cmdbuf, const uint16_t len) {
 	applog(LOG_INF, "wrote %d bytes", len);
 	if (write(lcd->fd, cmdbuf, len) <= 0) {
 		applog(LOG_ERR, "failed to execute write(), lost access to port?");